Blowpipe apparatus



(No Model.)

. M. D. BROWN 8v D. J. GRIFFIN.

BLOWPIPE APPARATUS.

No. 574,237; Patented Dec. 29, 1896.

UNITED STATES PATENT @FFICE.

MAURICE D. BROIVN AND DENNIS J. GRIFFIN, OF \VA'IERBURY, CONNECTICUT.

BLOWPIPE APPARATUS.

SPECIFICATION forming part of Letters Patent No. 574,237, dated December29, 1896. Application filed May 18, 1896. Serial No. 591,892. (Nomodel.)

To aZZ whom it may concern:

Be it known that we, MAURICE 1). BROWN and DENNIS J. GRIFFIN, ofWaterbury, in the county of New Haven and State of Oonnectiout, haveinvented a new Improvement in Blowpipe Apparatus; and we do herebydeclare the following, when taken in connection with the accompanyingdrawings and the letters of reference marked thereon, to be a full,clear, and exact description of the same, and which said drawingsconstitute part of this specification, and represent, in

Figure 1, a view in front elevation of a blowpipe apparatus containingour in vention; Fig. 2, a view in horizontal longitudinal section on theline a b of Fig. 1; Fig. 3, a view in vertical section, on the line 0 dof Fig. 2, through the gas-valve and gas inlet and outlet pipes; Fig. l,a view in transverse section on the line 6 f of Fig. 2 and lookingtoward the operating-arm connected with the rockshaft.

Our invention relates to an improved blowpipe apparatus, the objectbeing to provide simple, compact, durable, effective, and convenientmeans for automatically controlling and regulating the supply of air andgas to blowpipes.

\Vith these ends in view our invention consists in an apparatus havingcertain details of construction and combinations of parts, as will behereinafter described, and pointed out in the claims.

In carrying out our invention, as herein shown, we employ an oblongrectangular frame-plate A, having screw-holes A formed in its ends toadapt it to be secured in a vertical plane to a wall, partition, orother vertical support. The, said plate is provided with twohorizontally-arranged forwardlyprojecting corresponding supporting-armsB B, which terminate at their outer ends in horizontally-arrangedcylindrical valve-boxes O and O, which, as shown, are constructed withflanged disk-like caps 0 C The longitudinal axes of these boxes arelocated in the same horizontal line. The valve-box O is furnished with ashort upwardly-extending gasinlet pipe D, which is connected by means ofa short gas-pipe E with the gas-supply pipe F. The said valve-box C isalso furnished with a short downwardly-projecting gas-outlet pipe D,which is connected by means of a long gas-pipe E with the mixing-chamberG of the blowpipe G, which may be of any approved construction and whichis mounted in a horizontal position in a standard H, secured to thework-bench I. The valve-box O is constructed with an upwardly-extendingairinlet pipe J, which is connected by means of an air-pipe K with theair-supply pipe L, arranged parallel with the gas-supply pipe F andlocated above the same. The valve-chamber O is also furnished with adownwardly-projecting air-outlet pipe J, which is connected by means ofa long air-pipe M with the mixing-chamber G before mentioned.

Within the valve-box C we locate a cylindrical gas-valve N, having atransverse port N and constructed with a centrally-arrangedinwardly-projecting hub N containing a 1011- gitudinal socket N and atransversely-arranged set-screw N while the valve-chamber G contains acorresponding cylindrical airvalve 0, having a transverse port 0 andformed with an inwardly projecting centrally-arranged hub 0 having alongitudinal socket entered by a transversely-arranged set-screw 0 Thesaid hubs N and O of the valves N and 0 project inwardly through theinner caps C of the valve-chambers. The sockets N and O of the hubs ofthe valves receive the respective ends of a horizontally arrangedoperating rock shaft P, journaled in two horizontal bearing-arms P and Psecured to and projecting forwardly from the frame-plate A and locatedbetween the arms B B, carrying the valve-chambers C and O. Thesaid endsof the said shaft are rigidly secured within the said hubs,and hence tothe valves, by means of the set-screws N' and 0 An operating-arm Q,secured to the shaft P bymeans of a set-screw Q, and hearing against theinner face of the bearing-arm P is adapted at its outer end for theattachment of a treadle cord or wire Q which leads downwardly throughthe work-bench I and is attached to a treadle, which is not shown, butwhich may be of any ordinary construction. The said treadle is operatedfor rocking the shaft, and hence the valves, which are normally set sothat when the treadle is depressed the port N of the gasvalve X will bealined with the gas-inlet and gas-outlet pipes D and D and so that theport 0'' of the air-valve 0 will be alined with the air inlet and outletpipes J and J.

For automatically closing the valves we employ a spiral spring it,encircling the rockshaft 1 and interposed between the bearingarm 1 andthe operating arm Q and having one end engaged with the forward face ofthe frame-plate A and the other end engaged with the under face of theoperati1igar1n() which:

it exerts a constant ettort to hit, as shown in Fig. t, and hence closethe valves. The oscillation of the shaft 1 is limited bymeans of twostop-pins S and S, extending inwardly from the bearing-arn'i P .inposition to be engaged by theoperating-arm Q, the pin S stopping therotation of the shat'tin right position for the closing of the valvesand the pin in" stopping the shaft in the full-open positions thereof,in order, however, that the gas may not be entirely cut oil when theapparatus is not in use, we arrange the gas-valve N in such a positionthat it will not quiteclose and sh utoff the gas, which will thereforeburn with a small tongue oi. flame when the apparatus is not in use.

It will be understood,of course,thatin using the apparatus the workmanwill depress the treadle more or less, according to the character of theflame which he dcsires,the amount of gas and airsuppliedto the blowpipebeing directly dependent upon the extent to which he depresses thetreadle.

It will be apparent that an apparatus constructed in accordance with ourinvention effects a great economy of time and gas in the use of ablowpipe, as gas is not burned except when the blowpipe is in use and asno time is required to manipulate hand-valves in turning the gas oil?and on and in regulating the amount supplied to the blowpipe.

It is apparent that in carrying out our invention some changes from theconstruction herein shown and described maybe made, and we wouldtherefore have it understood that we do not limit oin'selves to such aconstruction, but hold ourselves at liberty to make such changes asfairly fall within the spirit; and scope of our invention.

ll'aving fully described our invention, what we claim as new, and desireto secure byilexl tors Patent, is

In. a blowpipe apparatus, the combination with a gas-valve and anlil'-\'ttl\'0, each having an inwardly-projecting hub, of gas and airinlet and outlet connections for the said valves, a blowpipe, means foreonnccting the said outlet connections therewith, a rock-shaftinterposed between the said valves, and rigidly connected with theirinwardly projecting hubs for the simultaneous operation of the valves,foot-power connection with the said shaft for rocking it in onedirection, and a spring arranget'l to operate the shaft in the otherdirection.

2. In a blowpipe apparatus, the combination with two supporting-armshaving valveboxes located in their outer ends, and provided withremovablecaps, gas and airvalvos located in the said boxes and providedwith inwardly projecting hubs which extend toward each other through thewalls of the boxes, air and gas inlet and outlet pipes connected withthe said boxes, a blowpipc, counection between the said outlet-pipes andthe blowpipe, a rock-shaft interposed between the valves andrigidlyconnected with their hubs, and means for rocking the said shaftin opposite directions for opening and closing the valves.

In a blowpipe ap mratusfthe conibination with a frame-plate, ot'supportingarms extending forwardly therelrom, valve-boxes located at theouter ends of the said arms, valves located in the said boxes, air andgas inlet and outlet pipes connected wit h the said boxes, a blowpipe,connection between the said outlet-pipes and blowpipe, a rock-shaftinterposed between the valves and rigidly connected at its ends with thesame, and means for rocking the said shaftiior opening and closing thevalves.

In testimony whereof we have signed this specification in the presem-eof two subscribing witnesses.

MAURICE fl). 'liltOhN. DENNIS J. tilltllil lN. Vitnesses:

FRANK. J. PARUITT, 'Ihvrmcr; GREEN.

